libopenflow: port stats requests default to all ports
libopenflow: port stats requests default to all ports

The default port used to be 0, which is invalid
(this was probably ancient libopenflow legacy).
The default is now OFPP_NONE, which means you
want status for all ports.

Thanks to William Emmanuel Yu

chenyuntc/pox,noxrepo/pox,carlye566/IoT-POX,jacobq/csci5221-viro-project,denovogroup/pox,chenyuntc/pox,jacobq/csci5221-viro-project,VamsikrishnaNallabothu/pox,chenyuntc/pox,adusia/pox,MurphyMc/pox,VamsikrishnaNallabothu/pox,PrincetonUniversity/pox,denovogroup/pox,pthien92/sdn,kpengboy/pox-exercise,adusia/pox,PrincetonUniversity/pox,diogommartins/pox,xAKLx/pox,xAKLx/pox,VamsikrishnaNallabothu/pox,xAKLx/pox,kulawczukmarcin/mypox,kpengboy/pox-exercise,jacobq/csci5221-viro-project,adusia/pox,noxrepo/pox,waltznetworks/pox,pthien92/sdn,jacobq/csci5221-viro-project,noxrepo/pox,diogommartins/pox,diogommartins/pox,adusia/pox,PrincetonUniversity/pox,MurphyMc/pox,carlye566/IoT-POX,kulawczukmarcin/mypox,denovogroup/pox,kavitshah8/SDNDeveloper,kavitshah8/SDNDeveloper,carlye566/IoT-POX,xAKLx/pox,denovogroup/pox,VamsikrishnaNallabothu/pox,pthien92/sdn,andiwundsam/_of_normalize,kpengboy/pox-exercise,chenyuntc/pox,jacobq/csci5221-viro-project,andiwundsam/_of_normalize,chenyuntc/pox,PrincetonUniversity/pox,denovogroup/pox,VamsikrishnaNallabothu/pox,adusia/pox,kulawczukmarcin/mypox,andiwundsam/_of_normalize,waltznetworks/pox,diogommartins/pox,kpengboy/pox-exercise,MurphyMc/pox,kpengboy/pox-exercise,kulawczukmarcin/mypox,noxrepo/pox,diogommartins/pox,andiwundsam/_of_normalize,xAKLx/pox,waltznetworks/pox,MurphyMc/pox,waltznetworks/pox,waltznetworks/pox,PrincetonUniversity/pox,kavitshah8/SDNDeveloper,MurphyMc/pox,pthien92/sdn,carlye566/IoT-POX,kulawczukmarcin/mypox,kavitshah8/SDNDeveloper,carlye566/IoT-POX,pthien92/sdn